Expanding folder and method of manufacturing same



Sept. 16, 1952 I M, FLAMgNT 2,610,868

EXPANDING FOLDER AND METHOD OF MANUFACTURING SAME Filed May 22, 1940 Inventor' Maance Flame/2t Attornegs Patented Sept. 16, 1952 QFFIGEEXPANDING FOLDER AND METHODXOF MANUFACTURING SAME Maurice Flament,Lille, France.

. Application May 22, 1940', Serial*No.-336;57l In France June9,.1939

' Section 1; Public Law 69U, August 8, 19.46.

' Patent expires June9, 1959 'iClaimsi (Ol.282 11.5')=

The I present invention relates to expandin folders of the concertinatype and more particularly to a stack of multifold inter-connectedseparate sheets or pads formed from a plurality of separate sheetscapable of beinglongitudinally expanded for use in connection withtypewriting,- bookkeeping and the like machines whereby recordings maybe made upon each of sheets having among its principal objects' toprovide a stackof recordingsheets of theaforesaid' character in whichsheets of the same or different kinds of quality or' of different colorsmay be employed.

Another equally important object of the invention is toprovide'expanding folders of the concertina type in which'eachfolder-consists of a-pad or a plurality of individual sheets of paperhaving the desired indicia thereon whereby 'dupllcate recordings may beobtained and adhesively connecting said sheets of paper of each foldertogether whereby they will be retained in perfect accuracy ofdelineation until the sheets of paper are separated for filing orother'extende'd use.

7 A still further object of the invention is to pro-' ers into a stack,trimming or dressing said sheets whereby their opposed edges will be .invertical alignment throughout the stack, applying glue which will remainflexible after drying to said vertically aligned and opposed edges ofthe stacks and finally severing alternate opposite adheslvely connectededges of saidfoldersgwhereby the remaining adhesively connected edges ofsaid folderswill permit the latter. to be expanded.

The annexed drawings show diagrammatically, as a type of non-restrictiveexample, a specimen of a multifold leaflet or folder of the concertinatype, and the method of carrying out the same.

Fig. 1 illustrates in perspective a stack of folders of the concertinatype made in accordance with the present invention with several of thefolders expanded therefrom.

Fig. 2 illustrates in perspective several of the folders arranged inspaced relation one upon the other to illustrate the position of thecontinuous severing thread or cord when placed therebetween, and

Fig. 3 illustrates in perspective an apparatus for withdrawing thesevering thread from a preformed steel; of folders placed thereupon.

In the accompanying drawings, the numeral l indicates a stack ofexpandableleafiets' or fo'lders and each mayconsist of a singlesheet ofpaper when only a single recording'isrequired or apa'd of separatesheets of paper when'duplicate'record ings are required. When a foldercontainstwo ormore separate sheets of paper; their front and rear edgesas indicated by the numerals! and 3' respectively are adhesivelyconne'cted't'ogether soias to prevent the; sheets of; paper. of eachfolder from moving or shifting in respect toone' another. As the soformed folders 4"and 5'jare placedoneupon theothertoform a stackgacontrimmed and opposededges 2 and 3.

tinuous thread 6 is inserted between the folders in the manner asillustrated in Fig, 2 of'the' drawings; The opposed edges" 2' and'3"ofthe stack of folders are then trimmed or dressedso that they will'beinvertical alignment throughout the entire stack.

Acoating of glue is then applied to the so The glue employed will remainflexible and yieldable after drying and is preferably obtained bydissolving latex rubber with one of itssolvents and it re-. quiredappropriate fats or inert componentsmay be, added thereto.

The opposite ends of eachsection of the thread. that are positionedbetween the folders 4 and 5 extend through the unattached edges thereofor those edges that are positionedat rightangles to the attached edges 2and 3..v The opposite faces 2 and 3 of the stack, being then coated withan appropriate glue, the sevening of each group of sheets in theirproper order is. obtained by pulling of the thread.

prising a bobbin 8 rotated moving cylinder 9.

Single sheeted or multifold concertina type folders are thereby obtainedwith a perfect accuracy of delineation: the sheets being unable tooverlap or slip and their use in typewriter and bookkeeping machines ismade possible.

The possibility of printing upon the sheets with conventional type ofprinting machines enables manufacturers to use all kinds of papers ofdifferent qualities or colors, without compelling them to be limited tothe standardised sizes imposed by the special machinery using paper inreels.

Further operations such as perforation, numbering, partial or totalcarbon coating made by 3 any of the known processes are also madepossible.

It is also possible to obtain an undetermined number of copies byprinting only alternate sheets and inserting carbon paper therebetween,or by applying a carbon coating upon the back of the sheets.

What I claim is:

1. A method for manufacturing a folder of the concertina type made up bya succession of distinct sheets of paper joined together at their frontand rear edges by a glue which keeps flexible after drying up, whichcomprises stacking the sheets, dressing the two opposite faces of thestack which correspond to the folds of the concertina folder, layingthreads between adjacent sheets, gluing said opposite faces of thestack,

to the folds of the concertina folder, gluing said concertina type madeup by a succession of distinct sheets of paper joined together at theirfront and rear edges by a glue which keeps flexible after drying up,which comprises stacking the sheets, laying between each sheet, whenstacking same, a thread going alternately from right to left and fromleft to right, dressing the two opposite faces of the stack whichcorrespond to the folds ofthe concertina folder, gluing said 7opposite'faces of the stack, drying up the glue,

drying up the glue, severing alternate opposite edges of the stack bypulling the thread alternately at each side of the stack.

2. A method for manufacturing a folder ofthe concertina type made up bya succession of distinctv sheets of paper joined together at their frontand rear edges by a glue which keeps flexible after drying up, whichcomprises stacking the sheets, laying between each sheet, when stackingsame, a thread going alternatively from right to left and from left toright, dressing the two opposite faces of the stack which correspond tothe folds of the concertina folder, gluing said opposite faces of thestack, dryin up the glue. severing alternate opposite edges of the stackby pulling the thread alternately at each side of the stack.

' 3. A method for manufacturing a folder of the concertina type made upby a succession of groups of superimposed distinct sheets of differentqualities and kinds, wherein the front and rear edges of the sheets ofeach group are joined together and to corresponding edges of the sheetsof the adjacent groups by means of a glue which keeps flexible afterdrying up, which comprises stacking the said groups of sheets, layingbetween each group, when stacking, a thread going alternately from rightto left and from left to right,

dressing the two opposite faces of the stack which correspond to thefolds of the concertina folder, gluing said opposite faces of the stack,drying up the glue, severing alternate opposite edges of the stack bypulling the thread alternately at each side of the stack.

4; A method for manufacturing a folder of the concertina type made up bya succession of distinct sheets of paper joined together at their frontand rear edges by a glue which keeps flexible after drying up, whichcomprises stacking the sheets, laying between each sheet, when stackingsame, a thread going alternately from right to left and from left toright, dressing the two opposite faces of the stack which correspondplacing the stack on a revolving plate, severing alternate "oppositeedges of the stack by pulling said thread in a continuous way, whenrotating the plate, by means of ,a winder comprising a bobbin and afriction cylinder actuating -the bobbin.

6. A method for manufacturing a folder of the concertina type consistingof individual sheets of paper, united alternately at their outer frontand rear edges which latter corresponds to the folds of the concertinafolder comprising the steps of piling the individual sheets of paperinto a stack, trimming the front and rear edges of said stack, coatingsaid trimmed edges of the stack with a glue that remains flexible afterdrying and severing the alternate opposite glued edges of the sheets ofpaper of the entire stack whereby the remaining glued edges of thesheets permit the latter to be expanded.

Y '7. A folder of the concertina type comprising a series of pads eachconsisting of a plurality of sheets of paper, said pads each having apair of opposed straight parallel edges, a film of a glue which remainsflexible after drying extending over the opposed parallel edges of eachpad whereby said sheets of paper are detachably connected together, andhinges formed by said film of glue extending across and betweenalternate pairs of edges of said series of pads.

MAURICE FLAMENT.

REFERENCES. CITED I The following references are of record in the fileof this patent: v

UNITED STATES PATENTS Number Name 'Date- 462,627 Cussons NOV. 3, 18911,341,782 Brick June 1, 1920 FOREIGN PATENTS I Number Country Date376,751 Great Britain July 13, 1932

